@media only screen and (min-width: 2400px) {
	.first_con { width: 1800px; margin-left: -900px;}
	.first_con h2 ,.second_top h2.tit_h ,.third .second_top h2.tit_h ,.product-item-opposite h2 ,.about_fwz h2 { font-size: 32px;}
	.product-item-opposite p { font-size: 20px; line-height: 40px;}
	.first_con p ,.second_top p.tit_p ,.third .second_top p.tit_p ,.about_fwz p { font-size: 24px; line-height: 48px;}
	.second_top span.tit_s { font-size: 28px;}
	.second_con, .third_con {width:1600px; margin: 0 auto;}
	.product-item {width:743px;height:393px; margin:50px auto 0;}
	.about_item .product-item-opposite p { font-size: 16px; line-height: 26px;}

	.second_about { margin-top: 38%;}
	.about_l span { top: 49%;}
}
@media only screen and (min-width: 1440px) and (max-width: 1900px) {
	.product-items {width:1000px; margin:0 auto;}
	.product-items { margin-top: 4%;}
	.product-item {width:458px;height:205px;margin:20px auto 0;}
}
@media only screen and (max-width:1440px) {
	/*关于我们页*/
	.about_items {
	    width: 843px;
	    margin: 20px auto 0;
	}
	.about_item {width:138px;height:138px;margin:0 70px;}
	.second_about {margin:8% auto 0;}
	.about_l span {top:48%;left:0;width:55px;text-align:center;}

	.second_about {margin:6% auto 0;}
	.second_about img {width:1116px;height:414px;}
	.second_about .hide {display:block;width:493px;height:203px;position:absolute;z-index:10;top:0;left:50%;margin-left:-246.5px;margin-top:10%;background:rgba(255,255,255,.7);border-radius:10px;}
}
@media only screen and (max-width:1199px) {
/*关于我们页*/.about_first {width:96%;margin:0 auto;}
.about_r {width:96%;margin:0 auto;}
.about_items {margin-top:80px;}
.about_item {width:138px;height:138px;margin:0 70px;}
.second_about {margin:8% auto 0;}
.second_about img {width:866px;height:404px;float:right;margin-right:0;}
.about_l span {top:48%;left:0;width:55px;text-align:center;}

.second_about .hide {display:block;width:493px;height:203px;position:absolute;z-index:10;top:0;left:50%;margin-left:-226.5px;margin-top:10%;background:rgba(255,255,255,.7);border-radius:10px;}
}
